News & Events

List Hygiene Services

DSF2®

Pinpoint Deliverable Addresses and Qualify for the Postage Discounts Your Business Deserves

Let's Start A New Project Together

Or Call Us 1-800-800-6245 Opt. 3

DSF2 – Delivery Sequence File

Mailing lists? Sharpened. Mailings? Targeted. Postal Discounts? Maximized. The DSF2 file contains every USPS® deliverable address in the U.S., which adds up to over 165 million records. DSF2 sorts mail into walk sequence order. This means the mail is sorted for the mail carrier to optimize delivery– saving the Postal Service™ time and qualifying you for postal discounts such as Enhanced Carrier Route (ECR), Basic, High Density, or Saturation. DSF2 is available through our Service Bureau with fast turnarounds. It also identifies if delivery is to a curb mailbox, door slot, or commercial mail receiving agency (CRMA).

Get the highest level of verified addresses to speed postal processing

Achieve maximum postal discounts to save on costs

Better target your mailings by distinguishing addresses as business or residential

Who Benefits from DSF2

Special Interest MailersAppended delivery points give you specific information for your mailing list such as business/residential, seasonal address, drop point flag and number of addresses associated with that drop point; CRMA; and P.O. Box Delivery Only.

Mailers concerned about deliverabilityDSF2 deliverability codes will help predict the deliverability of the addresses in your list. If your addresses don’t match the DSF2 file, they are likely to contain errors.

DSF2 processing will return a pseudo code to sort your files and will then update your list(s) by identifying known addresses and specific address attributes: If the address is vacant, residential, business, or seasonal. Then, it returns a flag to designate each record matched. It also identifies whether a ZIP + 4 address is currently represented in the USPS delivery sequence file as a known address record. DSF2 includes DPV®, LACSLink®, and SuiteLink® processing.

What Our Customers Say

"Melissa's technology works seamlessly with SQL Server Integration Services, and provides another way for my clients to achieve highest data quality information. Customer service was excellent, and their technical team provides top support for people wanting to use the technology."

"Melissa easily integrates into both our system and our vendor's systems. They offer a variety of cleansing solutions. Setting up our contract has been easy.
We are cleansing our data so that we do not mail invalid records. We've saved hundreds of thousands of dollars a year and decreased cost per acquisition."

"Provides a robust variety of services, paired with a great wiki documentation site that details all of their products/services. Sales/support are also very helpful. It was very easy to roll out and with the thorough documentation we had minimal issues configuring our network to permit the appropriate data through."

"The advanced features of the Address Object API allows us to greatly reduce our "undeliverable" loses and improve our next-day delivery customer experience. In my experience Melissa has done a fantastic job in advancing their products and services. We have been move then pleased by their performance and pricing for their products."

"The API was easy for my developers to integrate into the applications we use. The documentation was excellent and the customer support equivalent. Data integrity is also another key component and makes verifying addresses simple and accurate."

"The Api is easy to work with and the account rep folks are very response especially Riff. I've never had my service shut down even when we are over our allotted validations. The team works with us to ensure constant availability. If you need address validation with an easy to use product, Melissa is your friend."